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Finding the Fourth Proportional to 115,111.88, 158,861.71 and 69,794.20

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Solution

The fourth proportional to 115,111.88, 158,861.71 and 69,794.20 is: 96,320.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,111.88 : 158,861.71 = 69,794.20 : x
  2. Step 2: Convert to fraction form
    115,111.88/158,861.71 = 69,794.20/x
  3. Step 3: Cross multiply
    115,111.88x = 158,861.71 × 69,794.20
  4. Step 4: Simplify right side
    115,111.88x = 11,087,625,960.08
  5. Step 5: Solve for x
    x = 11,087,625,960.08/115,111.88
  6. Step 6: Final answer
    x = 96,320.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.